build: more fine-grained dependencies for documentation build tools

Perl is needed to build the manual pages, texi2html for the HTML pages.
ac3dec: Fix out-of-array read

Signed-off-by: Diego Biurrun <diego@biurrun.de>
mpegaudiodec: Consistently handle fixed/float templating
Add missing #includes for *INT64_MAX and *INT64_C
Merge commit 'f187557ab4612776f7f527ecf3d40062975c3e4c'

* commit 'f187557ab4612776f7f527ecf3d40062975c3e4c':
  build: more fine-grained dependencies for documentation build tools

Conflicts:
	configure
	doc/Makefile

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '48b24bd2d208ce0f124029ac4c5ac5cb1fca4175'

* commit '48b24bd2d208ce0f124029ac4c5ac5cb1fca4175':
  ac3dec: Fix out-of-array read

Conflicts:
	libavcodec/ac3dec.c

See: 2cbf27b08a4991de608b305a8600b59467587605
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '0eeeb9647e9c92c9edfd0b18c7cb5da7ac666f85'

* commit '0eeeb9647e9c92c9edfd0b18c7cb5da7ac666f85':
  mpegaudiodec: Consistently handle fixed/float templating

Conflicts:
	libavcodec/Makefile

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  Add missing #includes for *INT64_MAX and *INT64_C

Conflicts:
	ffmpeg.c
	ffmpeg_filter.c
	ffplay.c
	libavformat/assdec.c
	libavformat/avidec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
lavf/mpegenc: Print a warning if ac3, pcm_s16be or dts are muxed into mpeg1.

Some media players don't play the resulting files.
The warning should help users to avoid the issues described in ticket #1720.